In the Hitchhiker's Guide to the Galaxy series, the most indispensible form of technology is the Hitchhiker's Guide itself, a pocket computer containing information (some of it wildly inaccurate) about every place in the galaxy. Now the good people at Instructables have a posted a cool project that lets you create your very own Guide — just get crappy old handheld PC, stick Linux on it, and fill it entirely with Wikipedia. Presto, your own somewhat-inaccurate computerized guide to everything in the galaxy. Don't forget your towel! [Instructables via Hackaday]